Answer :
According to the information given, it is found that she has 15 minutes left for question C.
How is her total time divided?
- The total time is of 30 minutes.
- She spends 10 minutes on question A.
- She spends 5 minutes on question B.
- She spends x minutes on question C.
The sum of the time for each question is the total time, which can be at most 30, hence:
[tex]10 + 5 + x \leq 30[/tex]
[tex]15 + x \leq 30[/tex]
[tex]x \leq 15[/tex]
She has 15 minutes left for question C.
A similar problem, in which the information given is used to build and solve an expression, is given at https://brainly.com/question/24812278
From the information in the question, 15 minutes was spent on question C.
Equation
An equation is used in mathematics to describe problems. Typically, a problem is solved when sentences can be translated into equations.
From the question, we can see that;
- 10 minutes was spent on question A
- 5 minutes was spent on question C
The time spent on question C is obtained from;
10 + 5 + x = 30
x = 30 - (10 + 5)
x = 15
Hence, 15 minutes was spent on question C.
Learn more about equation: https://brainly.com/question/2263981